Aviom AllFrame - Manual (Page 48)

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ALL FRAME
™
Multi-Modular I/O System
Control Master and Clock Source
When an analog I/O device is the Control Master, there is no other analog device that can be used as a clock
source. When a digital I/O device such as the AllFrame with a C4dio card installed is part of an audio network, the
digital I/O device can be used as a Clock Master for the network and external clock sources can be connected.
External clock sources on the can include:
• Word Clock - via the dedicated BNC Word Clock jack
• AES3 (AES/EBU) - from AES3 digital stream 1/2
Clock Errors
Common causes for a clock error include:
Attempting to change the sample rate on an analog device other than the Clock Master in an •
all-analog network
Attempting to change the clock source when the network is
• password protected
Removing or changing • external clock sources on a digital I/O device (the network defaults to
using its internal clock until the external clock is restored)
Loss of an external clock source (word clock or AES3) on a digital I/O device caused by
•
intermittent connections, etc., on the external device
Sample Rates and A-Net Slots
Changing the network sample rate has a direct effect on the availability of A-Net Slots. For example, setting the
sample rate to 96kHz makes only 32 Slots available, numbers 1 through 32. Slot numbers above 32 are no longer
available.
If at the 48kHz sample rate an input-capable device such as the AllFrame F6 or 6416m is set to use the Slots
starting at 33 or higher and has active channels, these channels will be deactivated when the sample rate changes
to 96kHz. These Slot assignments no longer exist in the 96kHz network.